"Thanks for everyone's thoughts. Paddles was much loved, and not just by us", she wrote.
"Yes, sadly Paddles has died after being run over by a auto near the Point Chevalier home of the PM yesterday evening", the spokesperson said.
"I am quite happy for that person to continue logging on behalf of Paddles, keeping in mind Paddles has thumbs, I can't put it past her it's her own account as well", Ms Ardern previously told reporters.
The cat, who had a Twitter feed dedicated to her antics after the election, had already amassed a following of over 11,000 fans.
It also stated she was 'Not affurliated with Labour Pawty'. Gracie Brown, the Yorkshire terrier belonging to the USA ambassador to New Zealand, Scott Brown, also offered sympathies via her own Twitter account @DiploDogGracie.
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Mr Gayford had earlier this week wrote about an incident where the cat almost derailed Ms Ardern's phone call with US President Donald Trump.
The sad news of Paddles' untimely demise has been met with an outpouring of grief on social media.
The cat was famous for its opposable thumbs, with Ms Ardern jokingly calling her a "polydactyl" while Paddles" Twitter biography states "have thumbs, will tweet'.
More than a few tributes have been posted on Twitter for Paddles. She leapt up onto the chair next to Jacinda and began announcing her very squawky arrival.
'There was a flurry of action as I tried to hustle it into the next room while literally the leader of the free world was connected to our little home in Point Chevalier'.
While many can't believe that something so sad has happened, one thing is for sure - Paddles will certainly be missed.